package com.donaldy.jvm.attr;
import java.util.ArrayList;
import java.util.List;
import com.donaldy.jvm.loader.ByteCodeIterator;
public class LineNumberTable extends AttributeInfo {
List<LineNumberItem> items = new ArrayList<LineNumberItem>();
private static class LineNumberItem{
int startPC;
int lineNum;
public int getStartPC() {
return startPC;
}
public void setStartPC(int startPC) {
this.startPC = startPC;
}
public int getLineNum() {
return lineNum;
}
public void setLineNum(int lineNum) {
this.lineNum = lineNum;
}
}
public void addLineNumberItem(LineNumberItem item){
this.items.add(item);
}
public LineNumberTable(int attrNameIndex, int attrLen) {
super(attrNameIndex, attrLen);
}
public static LineNumberTable parse(ByteCodeIterator iter){
int attrNameIndex = iter.nextU2ToInt();
int attributeLen = iter.nextU4ToInt();
int lnTableLen = iter.nextU2ToInt();
LineNumberTable lnTable = new LineNumberTable(attrNameIndex, attributeLen);
for (int i = 0; i < lnTableLen; ++i) {
LineNumberItem lnItem = new LineNumberItem();
lnItem.setStartPC(iter.nextU2ToInt());
lnItem.setLineNum(iter.nextU2ToInt());
lnTable.addLineNumberItem(lnItem);
}
return lnTable;
}
}